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Theorem neleqtrrdOLD 2571
Description: Obsolete proof of neleqtrrd 2570 as of 13-Nov-2019. (Contributed by David Moews, 1-May-2017.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
neleqtrrd.1
neleqtrrd.2
Assertion
Ref Expression
neleqtrrdOLD

Proof of Theorem neleqtrrdOLD
StepHypRef Expression
1 neleqtrrd.1 . 2
2 neleqtrrd.2 . . 3
32eleq2d 2527 . 2
41, 3mtbird 301 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4  =wceq 1395  e.wcel 1818
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-ext 2435
This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-cleq 2449  df-clel 2452
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